Sponge Guide v3

In Nov. 2014, we published the 3rd edition of the Sponge Guide.  The new guide now contains over 2,100 images from 230 species morphs.

One momentous addition to the guide, thanks to work by Sven Zea, is the addition of composite images of skeletal structures in 49 species …

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Meet Mister Slate Pencil

That’s Mr. Slate Pencil to you. Meet a resident of Blazer Reef, the slate pencil sea urchin Eucidaris tribuloides.

During a routine afternoon feeding in the tank last Friday (Oct 24), Mr. Slate was observed releasing his gametes into the water column.   Continue reading